Forces & Interactions (unit 1 - science9)

When an object changes position relative to a reference point, the object is...

• Increasing in size
• Changing color
• In motion
• Decreasing in size

average speed can be represented by the mathematical equation...

• Distance / Time
• Distance * Time
• Speed / Time
• Speed * Time

on a distance-time graph of an object's motion, distance is usually...

• Plotted on the x-axis
• the dependent variable

• Represented by the slope of the graph
• Represented by the area under the graph

when the motion of an object is shown by a straight line on a distance-time graph with distance on teh y-axis, the slope of the line is the...

• Speed of the object
• Acceleration of the object
• Mass of the object
• Force applied on the object

displacement must always indicate...

• velocity

• direction

• speed

• time

acceleration can mean...

• speeding up

• slowing down

• changing direction

• all of the above

centripetal acceleration occurs because an object is...

• Moving in a straight line
• At rest
• changing direction

• Falling freely under gravity

acceleration can mathematically be represented as...

• Change in velocity divided by time
• Change in distance divided by time
• Change in speed divided by distance
• Change in time divided by velocity

When velocity changes by the same amount over each time interval, acceleration is...

• Decreasing
• Increasing
• Constant
• Zero

What does it mean when a change in velocity is negative?

• The object is speeding up
• The object is changing direction
• The object is at rest
• The object is slowing down